Terminal for electric cables.



PATENTBD SEPT. 8, i908.. 0 W. DAVIS. TERMINAL FOR ELECTRIG'GABLBS.

APPLICATION FILED DEG. Z3, 1907.

PATENTBD SEPT. 8, 1908.

G.. W. mms. TERMINAL PGR ELEGTRIG CABLES.

APPLGATION FILED DEG. 23, 1907.

3 SHEETS-SHEET 2 @LWR ,maramf l "ATE TED SEPT. 8. 1908.

W. DAVS.

BPPLIATION ILEI) DEU, 23, 1907.

3 SHEETS-SHEET 3.

Ein.

WITNESSES.'

certain improvements sections consisting-ot 'Gnoiinn straniere.

STATES' .CHARLES n'. Diviser snehwonrn sans COMPANY, or rirrssnes,

rnrsnr .YLVANLL ASSIGNOR TO STANDARD UNDER- .PENNSYLVANLL A CORPORATION OF PENN :run-ruiner., non nnncrnrc caninas.

spannenden of Letters natale Application tiled' December'23yl907i' Serial No. 407,798.

2b all 'ir/licht itmay concern:

Be it known tirati, `Cininrns W. DAvis, re-

siding at Edgewortlnin the county oi Allev gheny and State4 of Pennsylvania, a citizen of the United States, have invented or discovered -certain'new and useful Improvements in Terminals for lilectric Cables, of which improvement the following is a speoi'lication.

The invention described' herein relates to t l inv terminal heads .formingthe connection between the conductors' of' a cable lines, and 4has for its object a construction `whereby additional aerial lines maybe conconductors of the cable as' renected to the ..quired, Without disturbing connections previouslyiornied.

"It .is a further object of the invention to provide a terminal head consisting of similarly'eonstrieted sections or units to be seatted one uponnnother, so'that bythe use oi one orinore sections, heads for cables difiering 'Widely in the number of contained conductorscan be built up.

. The'invention ishereinafter more fully de-v scribed and claimed.

Inthe accompanying drawings forming a part of this speciiicatiou, Figure 1 is a sectional elevation ofone form of my ifiproved head; Fig. 2 is a plan view of the underside of the head shown in llig. 1v ,1F if. 3 is a perspeof tive View partly in section another form ot' head; Figs. 4 and 5 are sectional elevations of other. forms of heads.

My improved head consists of one or more body sections or units and a cap, the body preferably molded onto the cores.

The general cross-sect1onal contour of the annular body is tapering vso that the internal diameter of the lower portion 3 ot the body is substanftially equal to the external diameter of the.

upper portion et. When thus'` constructed and the portion 3 internally threaded and the portion 4 externally threaded, a series of- .'units or sections can be connected together 'forming a multiple head.

vand the aerial distributing a conducting core hav- The conducting cores are so'shaped and arranged in theinsulating material that at one end they projecten-t ofthe insulating material at points Within the outer periphery of the portion-4, While-the opposite endsfwill projectfrorn .the insulating material at points outside of such periphery. lt is preferred that the insulating material inclosing the outer portions ofthe conducting'cores should be made in the form 'of teat's orconical-projections 45 so that any moisture collecting thereon Williiow down tothe points and not towards adjacent cores. These projections arev Jiornied in a groove 6,'the outer Wall of which extends in the forni of a petticoat by preference to or below the level ol the ends of 'the treats 5. ln applying this head, the lead sheath is removed for a suitable distance and a conical metal sleeve 7 slipped on the cable to a point'below 'the stripped portions and secured to the lead sheath by a wiped ioint or in anyother suitable manner. A unit or section of the head is then slipped over the end oi the cable and screwed onto the threaded end of the sleeve. A number of the conductors are then electrically connected to the inner ends ofthe cores 1 by any means. ln the construction shown the projecting `ends of the cores are threaded for the reception oi nuts 8 for clamping the cable conductors to the cores. ln vcase it is desired to lead out more conductors than thenun'iber of'corcs contained in one unit or member. a second, and if necessary a third, unit is screwed and put into position successively and the cable conductors lattached to the cores. The cap may be formed With a knob l0, which serves as a convenient means for attaching the supu porting bracket to' the head.

In` Fig. 3 l have shown a terminal head consisting of abox or 'case 1'1 provided in one side With a tubular projection 12 through which the cable is inserted and to `which it is secured by a wiped joint. The end of the boxopposite that connected to the cable is removable for the insertion of the units, which in this form of head are made straight. Each unit is provided With a seat 13 outside of the shoulder@ corresponding to the portion 4 of the annular head, and a dovvn- ,'Wardly projectingv portion 3a corresponding 'to the portion4 3 of annular head and' adapted, when the units' are nested, to rest on the vsea`t13. In this construction the cores exe-- in grooves l5 in the sides of the'boX for the reception ot' ribs 16 onthe ends of the units.

y T he iront side ofthe boX cover 17 should be made vsulicien-tl long to extend below the up er edge oft -e upper unit of the series.

n Figs. 4 and 5 I have shown a form olf' my improvement especially applicable to lightpand power cables containing two or more conductors. Each unit consists of a core l of conducting material and a body of insulating material 'molded thereon. This insulating material is given a dish like shape 18 and is provided on opposite sides with centrally arranged projections i9 and 20 which -lorm 'seats or supporting portions when the units are arranged one on the other. The core l passes through the under projection 20 to a point above the upper surface of the disk and passes out in a substantially radial direction through the side of the upper projection. Each unit has a conducting core molded therein and one or more passages '2l through which the cores of superpose-duiiits may be threaded in nesting the units. The number ci such passages in any unit will be approximately dependent upon the number of units to be superposed. made with the maximum number of passages and in forming a head all the passages need not be utilized. llVhile .not essential the cap or top unit may have a core molded therein and thus form one of the units of the head. ln applying this head the cable is stripped and the thiinble or sleeve 22 slipped thereon. then arranged one on the other, thev cores of the upper units being threaded through the-passages ofthe unitsocoupying a lower position and also through 4passages in a base block 23. The cores are then connected to the conductors, the thimble or vsleeve screwed onto'the .lower end of the base block and its opposite end secured to the lead sheath by a wiped joint.

I claim herein as my invention: e

v l.v A terminal for cables having in combination a body section or unit consisting el a conducting lcore having a body of seli-siipporting insulating material molded thereon, the outlet end oi the core ext-endingout- Wardly through theI insulating material in a direction radial or'- approximately radial to the center of distribution and a cap supe Each unit can be The required number oi' units are.

scans? l port-ed by the unit and protecting the innerA end of the conducting core. I

2. A terminal i'orv cables having in combination a series of sections or units similarly. constructed and adapted. to'seat oneupon" seat at one end and correspondingly shaped portion at its opposite end and a conducting core molded in the insulating block and eX- tending through the insulating block from a point within the seat to a point'outsidefol' said seat. i l

Ll. .fitermin'al-ior cables having in combination Van annular block of insulating matev rial having a seat at one end and a corre-f,

spondingly shaped portion at its Vop osite end, and conducting cores molded in t ieinsulating block and ent-ending through said body from points within tlieperiphery of the seat to points outside oi the seat.

5. A terminal for cables having in combi-- nation an annular block of insulating materialprovided atone end vwith an externally threaded projection and having at its opposite end an internally threaded portion'of.

ysubstantially the samediameter as the eXd ternally threaded-portion and aseries ot'con- 'ducting cores extending'through' the insulating body from points within the externally threaded portion to points 'outside of the internally threaded portion.

ln a-terminal for cables, a plurality oi body sections or units, each consisting of a conducting' core having insulated material molded thereon, the outlet end oi the core extending outwardly thrruigh the ,insulatingmaterial in a direction radial or a )proximatelyradial to the center of distri ution, said unitsor sections being adapted to be seated one upon the other infcombination' with a cap adapted to cover-the top-section! '7. A terminal for cables having in combiv nation a block ol insulating material, having a seat at one end and a correspondingly shaped portion at its opposite end, and a con-l ducting core extendingthrough said block from a point within the seat to a point outside ot said seat.

ln testimony whereof, l have hereunto setv y my hand.

CHARLES W. DAVIS.

s llf'itnesses:

- Arion' A. Tinti),

.Finnois J. Toiilisson;

iie, 

